<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <!-- 开发环境版本 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <style>
      img {
        width: 500px;
      }
      .active {
        border: 10px solid aqua;
      }
    </style>
  </head>
  <body>
    <!-- 
        v-bind:


     -->
    <div id="app">
      <img v-bind:src="imgSrc" alt="" />
      <br />
      <img
        :src="imgSrc"
        alt=""
        :title="imgTitle+'!!!'"
        :class="{active:isActive}"
        @click="toggleActive"
      />
    </div>
    <script>
      var app = new Vue({
        el: "#app",
        data: {
          imgSrc: "kasha.jpg",
          imgTitle: "卡莎",
          isActive: false,
        },
        methods: {
          toggleActive: function () {
            this.isActive = !this.isActive;
          },
        },
      });
    </script>
  </body>
</html>
